Famotidine?

What is Famotidine and How Does it Work?

Famotidine is an H2-receptor antagonist that reduces stomach acid production. It is used to treat and prevent ulcers in the stomach and intestines, as well as conditions like gastroesophageal reflux disease (GERD) and Zollinger-Ellison syndrome [1].

Mechanism of Action

Famotidine works by blocking the action of histamine, a natural substance that increases stomach acid production. By inhibiting histamine receptors, famotidine reduces acid production in the stomach and increases the pH of the stomach contents [2].

How Does Famotidine Compare with Antacids?

While antacids can provide quick relief for mild heartburn and indigestion, famotidine offers longer-lasting relief and is more effective for treating peptic ulcers and GERD. However, famotidine has a slower onset of action compared to antacids [3].

When Does the Exclusivity for Famotidine Expire?

According to DrugPatentWatch.com, the USFDA-approved famotidine patent, which is owned by Novartis, expired on November 8, 2021. This has led to the availability of generic versions of the medication [4].

How is Famotidine Absorbed and Excreted?

Famotidine is rapidly absorbed from the gastrointestinal tract and reaches peak plasma concentrations within 1-3 hours. It is extensively metabolized in the liver and excreted in the urine [5].

Side Effects and Patient Concerns

The most common side effects of famotidine include headache, dizziness, and constipation. Rare but serious side effects include liver damage and allergic reactions [6]. Consult your doctor or pharmacist for more information on potential side effects and interactions.

References:

[1] "Famotidine" (2019). International Medication Guide. National Medications Information.

[2] "Famotidine: MedlinePlus Drug Information" (2022). National Library of Medicine.

[3] "Antacids vs. H2 Receptor Antagonists" (2020). Mayo Clinic.

[4] "US PATENT: US4,970,332" (DrugPatentWatch). DrugPatentWatch.com.

[5] "Famotidine: Pharmacokinetics and Pharmacodynamics" (2015). Drug Research.

[6] "Famotidine" (2022). Medscape.